Newly built backyard ADU in Los Angeles featuring a modern small house design with large windows, clean white exterior, wooden accents, and bright California sunlight in a residential neighborhood.

How Much Does It Cost to Build an ADU in Los Angeles? (2026 Guide)

Remodeling Tips
March 13, 2026•2 min read

How Much Does It Cost to Build an ADU in Los Angeles? (2026 Guide)

Newly built backyard ADU in Los Angeles featuring a modern small house design with large windows, clean white exterior, wooden accents, and bright California sunlight in a residential neighborhood.

Introduction

Accessory Dwelling Units (ADUs) have become one of the most popular home improvement projects in Los Angeles. Homeowners build ADUs to create rental income, provide space for family members, or increase property value.

If you are considering building an ADU, understanding the typical construction costs can help you plan your project and budget more effectively.

Average ADU Construction Cost in Los Angeles

The cost of building an ADU in Los Angeles can vary depending on the size, design, and construction type.

Typical price ranges include:

• Garage conversion ADU: $80,000 – $150,000
• Attached ADU: $120,000 – $200,000
• Detached backyard ADU: $150,000 – $350,000+

Homes in Santa Clarita and surrounding areas may have slightly different construction costs depending on design complexity and materials.

Factors That Affect ADU Construction Costs

Several factors influence the total cost of building an ADU.

Size of the ADU

Larger units require more materials and labor.

Construction Type

Detached ADUs usually cost more than garage conversions.

Permits and Design

Architectural plans, engineering, and city permits can add to the total cost.

Utilities

Connecting plumbing, electrical, and sewer systems may increase costs.

Benefits of Building an ADU

Many homeowners choose to build ADUs for several reasons:

• Generate rental income
• Increase property value
• Create housing for family members
• Add flexible living space

In Los Angeles, ADUs are considered one of the most valuable property improvements.

Work With an Experienced ADU Contractor

Working with a professional contractor ensures your ADU project is completed safely and according to local building regulations.

Re-Masters Remodeling provides ADU construction services for homeowners across:

• Los Angeles
• Santa Clarita
• San Fernando Valley
• Antelope Valley

Start Your ADU Construction Project

If you're planning to build an ADU on your property, our team can help guide you through the design, permits, and construction process.

Request your free ADU construction estimate today.

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Re-Masters Remodeling is a professional home remodeling contractor serving homeowners across Los Angeles, Santa Clarita, San Fernando Valley, and Antelope Valley. With over 20 years of construction experience, our team specializes in kitchen remodeling, bathroom renovations, and ADU construction. We share remodeling tips, cost guides, and home improvement insights to help homeowners plan successful renovation projects.

Re-Masters Remodeling

Re-Masters Remodeling is a professional home remodeling contractor serving homeowners across Los Angeles, Santa Clarita, San Fernando Valley, and Antelope Valley. With over 20 years of construction experience, our team specializes in kitchen remodeling, bathroom renovations, and ADU construction. We share remodeling tips, cost guides, and home improvement insights to help homeowners plan successful renovation projects.

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